Guiding truck



cf JABLow GU'IDING TRUCK June 14, 1927..

Filed 0G12. 15. 1923 3 Sheets-Sheet l4 INVENTOR WITNESSES:

Char/es Jablorv.

C. JABLOW GUIDING TRUCK June', 14, 1927.

Filed oct. 15. 1923 3 Sheets-Sheet 2- INVENToR Char/es fab/0W.

June l 14, 1927.

c. JABLow GUIDING TRUCK Filed oct. 15, V1,925 5 sheets-Sheet ATTOR NEY Patented l.lune 14, 1927.

UNITED STATES Viia'rpriiv'r OFFICE'.

ICHARLES JABLOW, OF EAST PITTSBURGH, rENNsYLvnNIA, AssIGNOR To WESTING HOUSE ELECTRIC a MANUFACTURING COMPANY, A CORPORATION OE PENNSYL- VANIA;

GUIDING TRUCK Application filed October 15, 1923. Serial No. 668,489.

My invention relates to railwayvehicles, more especially to` guiding and trailing trucks that are associated with the main frame `of railway locomotives, particularly v electrical railway vehicles, at the head and the trailing ends- It is among the objects of my invention to provide a guidingV truck, or thelike, for electric locomotives which shall be of simple l0 mechanical construction, Which: shall function e'liiciently to produce a steering action relative tothe truck and vehicle body and whichA shall be applicable to standard rail- VWay locomotives, particularly locomotives of the articulated type.

In heavy traction locomotives, it yis ad- Vvantageous to provide guide trucks at the head end to assist in the steering action of the vehicle by `closely followingtlie gage, for the purpose of :obtaining greater efficiency in operation and `minimizing the flange Wear ot' the drive Wheels and stresses in the main frame of the locomotive. ous types of steering mechanisms have been proposed to accomplish this' result all of which have some operating y orv structural limitations that make them :mechanically f complicated or ineflicientin operation.

My present inventionv obviates thediiiiculties encountered in prior structuresand further provides anautomatic steering or guiding feature that produces a desired leadingtendency 'when tlieftruck isat the head end of a locomotive "and'when trailing, the f truck is permitted to run free or idle inthe 4gage With only a small amount of lateral restraint. i n j `The constructionof lthe trucktransoin and' center pin bolster for associating the truck With the Vmain frame of thevehicle is such as to rovide 'a device thatis designed to olfer yie ding lateral restraint, While per-` mitting longitudinal movement by .means of compression links that are applicable to V either tivo or four-Wheeled trucks.- y

Iny lthev accompanying 'drawings constituting apart hereof and iniwhich likerrefer-- ence characters'designate like'fpartst vention,

Vari- `a convex outer surface '8, Fig. 3.

bolster embodied in the truck shown in Fig. Il, 1 i

Fig. 3 is a cross-sectional view the line III-III of Fig. 2, i

Fig. 4 is a cross-sectional view taken along taken along Vtially in cross-section, of the transomand i journal-box mounting and Wheeled kaxles 1,

2 `and 3, respectively. The side frames l are secured rigidly at their ends by means of a plurality ottransverse tie-rods 4. A centrally located transom 5 is secured to the longitudinal side frames l in a suitable manintegrally therewith. ,l

The transom 5 is provided with recessed or dished portions 6 that areadapted to rener, as by rivets or bolts, or it maybe cast spectively receive va plurali-ty' of members i 7', Lof substantially torus shape, each having i i The members 7 constitute compressionlinks for a center pin lbolster -9 that'engages the memL bers 'Frat itsy seating portions `l0, vvliich'rel spectively correspond to, and are' located opposite the recesses inthe transom 5., The bolster 9 is provided with a central opening `11 -`andarecess l2 that are adapted'tofreceive a center pin (not shown), Which is secured therein by a ring 13theother portion vofthe'center pinbeing secured in the main frame of the vehicle'body, in accordance with-afamiliar-practice;y

The transom': is further.providedwith extending bracketsl having a' plurality of openings 16 in'V horizontal` axial valinement and adaptedftoj' receive cylindrical bodies 17 such as pins, tubes, orythe" like, Which are cured yin the brackets v"1.5 lby. small pins Y 18. :A plurality of -lielical springs l?)k are il disposed around the cylindrical membersV 17,

each f spring being positioned intermediate a pair tof. movable "blocks` 20v having slotted openings 2'1fthat are' adapted to engage v'pins 22l On'the'inenbers' 17.?y lThe blocksV` V20 are limited in their sliding movements by the stop pins 22, which are shown against the ends of the slots 21 and in this, their neutral position, the springs 19 are under initial compression. If desired, the block meinbers 20 may be fixed on the transom 5 and the cylindrical members 17 may be adapted to move in the brackets 15 to accomplish the same relative function of movement against the coil springs 19. The bolster l9 is provided with a substantially V-shape or forked guide 23, which is adapted to 4engage the movable blocks 2() that are mounted on the transom 5. Y

A pluiality of friction pads 25 are secured on the transom 5 and the bolster 9, respectively, toprovide limited frictional engagement of these members when the truck member is in a trailing position.

The operation ofV this device is brieliy as follows: Assuming the bolster 9 to have a center pin connection with the main frame of the vehicle and the `truck to be on the head end of the locomotive and moving in the diiection indicated by the arrow, the eo-action of the bolster and the yielding` restraining` mechanism comprising the cylindrical menibers, springs and blocks 17, 19 and 20, respectively, is such as to produce a leading tendency of the truck member, that is to say, effect steering action of the vehicle body relative to the rails.

This `function is produced by the engagement of the forked guide 23 with the movable blocks 20, (as shown in Fig. 5) which engagement is automatically effected by the adhesion of the wheels to the rails or in other words, by the weight on ythe wheel axles. This condition automatically causes the bolster to fall into engagement with the blocks 20, which are adapted to. produce a positive steering action. In this position, the compression links or rollers 7 are inclined slightly from the vertical center line towards the rear end of the truck (as shown in Fig. 6). i

Should the locomotive be reversed, the steering mechanism will be disengaged either auton'iatically by the rolling resistance of the truck, or by slight application of 'the brakes on this truck, or by otherineans, and the bolster 9 will swing past the vertical center lines of the compression members 7 which become inclined in the opposite directionv to effect engagement of the friction pads 25. rlhe degree of .longitudinal movement of the bolster and transom is fixed bythe members 7 so that when the bolster engages the transom pads 25, the longitudinal force exerted by the weight on the bolster is equal to the starting resistance at the rail and thisforce maintains the bolster in a trailing position which permits the truck to run free in the gage with only such lateral vrestraint as may he imposedby the compression links :7.V f

Although I have described a specie embo-diment of vmy invention, it will be obvious to those skilled in the art that various moditications may be made in the construction of the transom, bolster, tori oi' compression links and steering mechanism without departing from the principles herein set forth.

I claim as my invention 1. A guide truck for railway vehicles comprising a wheeled truck frame, a transom Aconnecting the side frames thereof, a bolster mounted on said transom, and steering means associated with said transom and bolster comprising a plurality of roller links capable of longitudinal and limited lateral nieveinent on said transom.

2. A guide truck for railway vehicles comprising a wheeled truck frame,` a transom connecting the side frames thereof, a bolster mounted on said transom, and steering means associated with said transom and bolster comprising a plurality of substantially torus shape roller links capable of longitudinal and'limited lateral movement on said transom. Y

3. A guide truck for railway vehicles comprising a wheeled truck frame, a transom coiinectingthe` side frames thereof, a bolster mounted on said transom, steering means associated with said transom and bolster comprising a plurality of roller links having a conveX periphery capable of vlongitudinal and limited lateral movement on said transom. A

4. A guide truck for railway vehicles comprising a wheeled truck frame, a transome connecting the side frames thereof, a bolster mounted on said transom, said transom and bolster havingv recessedV portions,

steering means associated with said transom and bolster comprising a plurality of roller links having a convex periphery seated in said recessed portions provided in said bolster and transom, said links being free to roll iii a direction normal to their axis and be inclined transversely thereof. Y

. 5. lThe combination withl a .guider truck for railway vehicles, of a truck transom and movable centerpin bolster, said transom havingv a yielding lateral restrainingy mechanism adapted to co-operatively engage-'said bolster to effect relative steering action of said transomv and bolster and to become .disen-y ies gaged therefrom to effect a trailing action therebetween,

6. The combination with a guide truck for railway vehicles, of a truck transom and movable centerpin bolster, said transom having a yielding lateral restraining mechanism adapted to be engaged by said bolster for effecting relative steering action of said truck and bolster, and to become disengaged therefrom to effect a trailing action therebetween.

7 rfhe combination with a guide truck for railway vehicles, of a truck transom and movable centerpin bolster, said transom having a yielding lateral restraining compression mechanism adapted to be engaged by said bolster for effecting relative steering action of said truck and bolster.

8,. The combination with `a guide truck for railway vehicles, of a truck transom and movable centerpin bolster, said bolster being provided with a forked guide, said transom having a yielding lateral restraining mechanism adapted to be engaged by said bolster, said mechanism comprising a plurality of movable blocks and a pluralityv of spring-mounted cylindrical bodies carried thereby and adapted to engage said forked guide of said bolster.

9. rlhe combination with a guide truck for railway vehicles, of a truck transom and movable centerpin bolster, said bolster being provided with a forked guide, said transom having a yielding lateral restraining mech-V anism adapted to be engaged by said bolster, and mechanism comprising a plurality of movable blocks, a plurality of resiliently mounted cylindrical bodiesvcarried thereby and adapted to engage said forked guide of said bolster.

l0. The combination with a guide truck for railway vehicles, of a truck transom and movable centerpin bolster, having a plurality of cosoperating seating portions, a plurality of roller members movably mounted in said seating portions, a plurality of friction pads secured in co-operatve alinement on said transom and bolster to effect ked in said seating portions and adapted to roll ytransversely and be inclined longitudinally of the truck center line, a plurality of friction pads secured in co-operative aline- GOV ment on said transom and bolsters to effect 'Y yfrictional engagement thereof for one .direction of truck travel, a plurality of resiliently mounted laterally movable blocks mounted on said transom, and a guide portion on the opposite face of said bolster adapted to engage said blocks to effect steering of said bolster relative to the truck when the latter travels in the opposite direction.

12. A guide truck for -railway vehicles comprising a wheeled truck frame, steering means associated therewith and a bolster mounted on said truck frame,` said bolsterl being adapted to engage said steering means when the vehicle is traveling in one direction and to become automatically disengaged therefrom when the direction of travel is reversed.

13. A guide truck for railway` vehicles comprising a wheeled truck frame, a transom connecting the side frames thereof and vhaving a plurality of dished recesses therein, a plurality of substantially torus shaped roller links mounted in said recesses, and a bolster having corresponding dished recesses mounted upon said links. Y

In testimony whereof, I have hereunto subscribed my name this 9th day of October, 1923.

CHARLES JABLow. 

